Improvement in reflectors



G. COTHREN. Reflector.

No. 209,328. Y Patented Oct. 29,1878.

UNITED STATES PATENT QEEToE.

oHAELEs ooTHEEN, oF NEW YORK, N. Y.

||v| PRovEM ENT IN REFLEoToRs.

Specification forming part of Letters Patent No. 209,328, dated October29, 1878; application led February 9, 1878.

all the rays of light, and be durable and veryl cheap; and the noveltyconsists in constructing the reector, or each portion thereof, ofsections of metal of single thickness secured to rods or rings, andfinished on both sides, so that they shall have like reilectin g power.

In -the drawings, A denotes the main or lower portion of my reflector,made, as is now common, in the form or shape of a truncated cone, andattached or secured in any proper way or manner to the gas-pipe B, so asto be in suitable relation to the burner or light C. This portion C ismade of sections or pieces of a single thickness of metal, finished onboth sides, and preferably corrugated from top to bottom, and fixed uponrods a a', which serve to form the top and bottom lines of a truncatedcone by bending the ends of said sheets over said rods.

The upper and under surfaces of said sheets are highly burnished orpolished, and each will be well adapted to reflect all the rays of lightthat may be cast on them. The corrugated form adds materially to thispower of reflection.

Above the lower part, A, and at a proper distance to secure the bestadvantages from the light, is placed the conical upper part, D, of myreflector. This may be fixed in place by securing it to the gas-pipe B,or in any suitable way adjusted or held in its said place. This is alsomade of metal of a single thickness and in one or more pieces, andpreferably is corrugated from its center to the circumference, and hasits upper and under surfaces highly polished.

In some instances it may be of advantage to use two or more parts orsections similar to A, and the reector may be secured to its own shaftand not be attached to the gaspipe; and in many such ways the meredetail of construction and using said reflector may be changed.

When thus made and put in use the rays of light from the burner O willstrike precisely on the under surfaceof A, or, passing through thecentral opening in A, will strike on the under'surface of D. The deviceis so arranged that noy inconsiderable portion of the rays thus come tothe under surface of D; hence they are diverted downward at anangle'upon the bright upper surface of A, and thence upon the wall,where a portion of the rays will come back upon the upper surface of D.In this way the largest utilization of the light is made, and not onlywill the room or apartment be fully lighted below the reflector, butthere will be sufficient reflection of the light upon the ceiling tomake the upper part of the room or apartment highly illuminated.

In some instances, as where there is not space for the severalreflectors, a single reector made in general likethe lower part, A-thatis, with double reflecting-surfacesmay be used with very good results,and afford, in a very large degree, all the advantages designed by thisinvention.

In the details of construction my reflector'.

will be found very cheap as well as very strong and serviceable.

In order to preserve the polished surfaces from action of theatmosphere, or from heat, or any hurtful influence that might tend todim it oi1 lessen the reiiecting power, I put upon them a coating ofperfectly transparent lacquer. This will not in the least interfere withtheir reflecting power, and will be a sure protection against allharmful or deteriorating influences.

I am aware that reflectors having double reflecting-surfaces have beenmade where i the double thickness of the reflecting material and glasshave been used on both the upper and lower surfaces of the reflector,and sometimes a double thickness of metal has been used for likepurpose; but in such instances the device produced was heavy and costly.

I am also aware that thin metal has been used forlamp-chimney shades orreflectors;

but suchare not adapted for like use7 as in curedto rods a a',substantiallyv its and for the present case, no1` are they provided with:t purposes set forth.

double reflecting-surface. In testimony that I claim the foregoing asHaving thus described my invention, what my own I affix my signature inpresence of I consider new, and desire to secure by Lettwo witnesses.

ters Patent, is- CHARLES CO'IHREN'.

A reflector made of sections of sheet metai Witnesses: v of singlethickness and having an inner and FREEMAN SKINNER,

outer iinished and reflecting-surface, and se- 1 W. W. STEPHENS.

